DSA-2657-1 postgresql-8.4 -- guessable random numbers

A vulnerability was discovered in PostgreSQL database server.
Random numbers generated by contrib/pgcrypto functions may be easy
for another database user to guess.

For the stable distribution (squeeze), this problem has been fixed in
version 8.4.17-0squeeze1.

For the testing (wheezy) and unstable distribution (sid), postgresql-8.4
packages have been removed; in those, this problem has been fixed in
postgresql-9.1 9.1.9-0wheezy1 (wheezy), and 9.1.9-1 (sid) respectively.

Note: postgresql-8.4 in Squeeze is not affected by CVE-2013-1899
(database files corruption) and CVE-2013-1901
(unprivileged user can interfere with in-progress backups).